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首页> 外文期刊>Environmental Science & Technology >Organic Pollutant Degradation in Water by the Vacuum-Ultraviolet/Ultraviolet/H_2O_2 Process: Inhibition and Enhancement Roles of H_2O_2
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Organic Pollutant Degradation in Water by the Vacuum-Ultraviolet/Ultraviolet/H_2O_2 Process: Inhibition and Enhancement Roles of H_2O_2

机译：真空-紫外线/紫外线/ H_2O_2工艺降解水中的有机污染物：H_2O_2的抑制和增强作用

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摘要

A vacuum-ultraviolet/ultraviolet (VUV/UV) mercury lamp was found to be a highly efficient radiation source for UV-based advanced oxidation processes (AOPs). If this lamp could enhance the UV/H2O2 process, it would be very attractive. Hence, we have investigated sulfamethazine (SMN) degradation by the VUV/UV/H2O2 process based on a bench-scale mini-fluidic VUV/UV photoreaction system (MVPS), a pilot reactor, and a model analysis. At high [SMN](0) in the MVPS, the apparent SMN degradation rate constant (k(app)') increased with increasing H2O2 dose, while at low [SMN](0), k(app)' decreased with increasing H2O2 dose; this behavior was unexpected. Meanwhile, at low [SMN](0) in a pilot reactor, H2O2 induced just a slight enhancement in the VUV/UV/H2O process. A numerical simulation of the process suggested that for an integrated AOP (i.e., VUV/UV/H2O2) consisting of various component AOPs, H2O2 could inhibit the component AOPs with HO* that did not originate from H2O2 (e.g., VUV photolysis of water). The apparent H2O2 role in the integrated AOPs was dependent on the contribution comparison between component AOPs that involved HO* that did or did not originate from H2O2. These results revealed important information regarding the application of the VUV/UV/H2O2 process in water treatment.
机译：真空紫外线/紫外线（VUV / UV）汞灯被发现是基于紫外线的高级氧化工艺（AOP）的高效辐射源。如果这种灯可以增强UV / H2O2的作用，那将是非常有吸引力的。因此，我们研究了基于台式微型流体VUV / UV光反应系统（MVPS），中试反应器和模型分析的VUV / UV / H2O2工艺对磺胺二嗪（SMN）的降解。在MVPS中高[SMN]（0）时，表观SMN降解速率常数（k（app）'）随着H2O2剂量的增加而增加，而在低[SMN]（0）时，k（app）'随着H2O2剂量的增加而降低剂量;此行为是意外的。同时，在中试反应器中，在[SMN]（0）低的情况下，H2O2引起VUV / UV / H2O过程的轻微增强。该过程的数值模拟表明，对于由各种组分AOP组成的集成AOP（即VUV / UV / H2O2），H2O2可以抑制并非来自H2O2的HO *组分AOP（例如，水的VUV光解） 。在集成AOP中明显的H2O2作用取决于涉及HO *的组分AOP之间的贡献比较，而HO *源自或不源自H2O2。这些结果揭示了有关VUV / UV / H2O2工艺在水处理中的应用的重要信息。

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  • 来源
    《Environmental Science & Technology》 |2019年第2期|912-918|共7页
  • 作者

    Li Mengkai; Li Wentao; Bolton James R.; Blatchley Ernest R. III; Qang Zhimin;

  • 作者单位

    Univ Chinese Acad Sci, Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, Peoples R China|Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA;

    Univ Chinese Acad Sci, Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, Peoples R China;

    Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 1H9, Canada;

    Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA|Purdue Univ, Div Environm & Ecol Engn, W Lafayette, IN 47907 USA;

    Univ Chinese Acad Sci, Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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